CN104297769A - Satellite navigation dual-mode dual-channel radio frequency chip - Google Patents
Satellite navigation dual-mode dual-channel radio frequency chip Download PDFInfo
- Publication number
- CN104297769A CN104297769A CN201310299046.3A CN201310299046A CN104297769A CN 104297769 A CN104297769 A CN 104297769A CN 201310299046 A CN201310299046 A CN 201310299046A CN 104297769 A CN104297769 A CN 104297769A
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- CN
- China
- Prior art keywords
- frequency
- input end
- analog
- output terminal
- satellite navigation
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/32—Multimode operation in a single same satellite system, e.g. GPS L1/L2
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses a satellite navigation dual-mode dual-channel radio frequency chip. The satellite navigation dual-mode dual-channel radio frequency chip includes a frequency synthesizer, a first low-noise amplifier, a first mixer, a first intermediate-frequency filter, a first variable gain amplifier, a second low-noise amplifier, a second mixer, a second intermediate-frequency filter, a second variable gain amplifier, an analog adder and an analog-to-digital converter. Compared with a traditional satellite navigation dual-mode dual-channel radio frequency chip, and according to the satellite navigation dual-mode dual-channel radio frequency chip of the invention, two paths of analog signals which are converted into intermediate-frequency signals through down-conversion are added together in a time domain so as to be synthesized into one path of analog signals, and then, an analog-to-digital converter module is utilized to perform quantization processing on the synthesized analog intermediate-frequency signals, and only one analog-to-digital converter is required to be used in the chip, and therefore, the area of the chip can be significantly reduced, and the power consumption of the chip can be reduced, and the number of pins of the radio frequency chip which are connected with a baseband can be decreased.
Description
Technical field
The invention belongs to technical field of satellite navigation, be specifically related to a kind of satellite navigation Dual-mode two-way road radio frequency chip.
Background technology
Satellite navigation system has totipotency (land, ocean, aerospace), round-the-clock, continuity and real-time, and provide the features such as navigation, location and timing services, therefore the every field such as national economy and national defence is widely applied.
Military hardware navigation such as the satellite navigation applications such as individual combat navigational system, military issue weapons platform navigation, ammunition propose more demands to aspects such as navigator microminiaturization, portability, dirigibilities, especially when equipment runs into strong jamming when applying, system needs to be switched to other navigational system according to actual interference frequency and intensity and carries out continuous navigation.Therefore, the implementation method of further investigation multimode multi-channel satellite navigation system, has very important military value and realistic meaning.
Inner integrated two the independently physical channels of traditional satellite navigation Dual-mode two-way road radio frequency chip, the satellite navigation signals receiving two frequency bins respectively (is set to RF
b1and RF
b2), and downconverted to intermediate frequency and (be set to IF
b1and IF
b2), then being treated to digital signal through analog to digital converter module quantifies, digital signal exports for base band the most at last.Need two analog to digital converter modules in such an embodiment, so chip area is large, chip power-consumption is high, and the number of pin that radio frequency chip is connected with base band is many.
Summary of the invention
The present invention, in order to solve the deficiency of existing conventional art, provides a kind of satellite navigation Dual-mode two-way road radio frequency chip, reduces chip area, reduce chip power-consumption, decrease the number of pin that radio frequency chip is connected with base band.
Technical solution of the present invention is: a kind of satellite navigation Dual-mode two-way road radio frequency chip, comprises frequency synthesizer, the first low noise amplifier, the first frequency mixer, the first intermediate-frequency filter, the first variable gain amplifier, the second low noise amplifier, the second frequency mixer, the second intermediate-frequency filter, the second variable gain amplifier, analog adder, analog to digital converter; Wherein satellite navigation signals is inputted by antenna, satellite navigation signals one inputs the input end of the first low noise amplifier, the output terminal of the first low noise amplifier is connected with the input end of the first frequency mixer, another input end of first frequency mixer is connected with the output terminal of frequency synthesizer, the output terminal of the first frequency mixer is connected with the input end of the first intermediate-frequency filter, and the output terminal of the first intermediate-frequency filter is connected with the input end of the first variable gain amplifier; Satellite navigation signals two inputs the input end of the second low noise amplifier, the output terminal of the second low noise amplifier is connected with the input end of the second frequency mixer, another input end of second frequency mixer is connected with another output terminal of frequency synthesizer, the output terminal of the second frequency mixer is connected with the input end of the second intermediate-frequency filter, and the output terminal of the second intermediate-frequency filter is connected with the input end of the second variable gain amplifier; The output terminal of the first variable gain amplifier is connected with the input end of analog adder, the output terminal of the second variable gain amplifier is connected with another input end of analog adder, the output terminal of analog adder is connected with the input end of analog to digital converter, the output termination baseband processor of analog to digital converter.
The present invention and conventional satellite are navigated compared with Dual-mode two-way road radio frequency chip, the advantage had and effect are: the two-way simulating signal downconverting to intermediate frequency is added in time domain by the present invention, synthesize a road simulating signal, then quantification treatment is carried out with the analog if signal of an analog to digital converter module to synthesis, chip internal only needs use analog to digital converter, thus significantly reduce chip area, reduce chip power-consumption, decrease the number of pin that radio frequency chip is connected with base band.
Accompanying drawing explanation
Fig. 1 is satellite navigation Dual-mode two-way road of the present invention radio frequency chip theory diagram.
Fig. 2 is the satellite navigation signals spectrogram that the present invention inputs via antenna.
Fig. 3 is the intermediate-freuqncy signal spectrogram after satellite navigation signals one down coversion of the present invention.
Fig. 4 is the intermediate-freuqncy signal spectrogram after satellite navigation signals two down coversion of the present invention.
Fig. 5 is the spectrogram after two-way intermediate-freuqncy signal of the present invention is added.
Embodiment
See Fig. 1, a kind of satellite navigation Dual-mode two-way road radio frequency chip, comprises frequency synthesizer 1, first low noise amplifier 2, first frequency mixer 3, first intermediate-frequency filter 4, first variable gain amplifier 5, second low noise amplifier 6, second frequency mixer 7, second intermediate-frequency filter 8, second variable gain amplifier 9, analog adder 10, analog to digital converter 11; Wherein satellite navigation signals is inputted by antenna, satellite navigation signals one inputs the input end of the first low noise amplifier 2, the output terminal of the first low noise amplifier 2 is connected with the input end of the first frequency mixer 3, another input end of first frequency mixer 3 is connected with the output terminal of frequency synthesizer 1, the output terminal of the first frequency mixer 3 is connected with the input end of the first intermediate-frequency filter 4, and the output terminal of the first intermediate-frequency filter 4 is connected with the input end of the first variable gain amplifier 5; Satellite navigation signals two inputs the input end of the second low noise amplifier 6, the output terminal of the second low noise amplifier 6 is connected with the input end of the second frequency mixer 7, another input end of second frequency mixer 7 is connected with another output terminal of frequency synthesizer 1, the output terminal of the second frequency mixer 7 is connected with the input end of the second intermediate-frequency filter 8, and the output terminal of the second intermediate-frequency filter 8 is connected with the input end of the second variable gain amplifier 9; The output terminal of the first variable gain amplifier 5 is connected with the input end of analog adder 10, the output terminal of the second variable gain amplifier 9 is connected with another input end of analog adder 10, the output terminal of analog adder 10 is connected with the input end of analog to digital converter 11, the output termination baseband processor of analog to digital converter 11.
First the satellite navigation signals of different frequent points is received by antenna, then inputs the input end of the first low noise amplifier and the second low noise amplifier, and its signal spectrum as shown in Figure 2;
Satellite navigation signals one amplifies through the first low noise amplifier, then the first frequency mixer is inputted, the local oscillation signal that first frequency mixer is provided by frequency synthesizer drives and carries out down-converted to satellite-signal, intermediate-freuqncy signal after down coversion inputs the first intermediate-frequency filter again and carries out filtering process, the intermediate-freuqncy signal processed after filtering inputs the adjustment that the first variable gain amplifier carries out gain, through Gain tuning satellite navigation intermediate-freuqncy signal one frequency spectrum as shown in Figure 3;
Satellite navigation signals two amplifies through the second low noise amplifier, then the second frequency mixer is inputted, the local oscillation signal that second frequency mixer is provided by frequency synthesizer drives and carries out down-converted to satellite-signal, intermediate-freuqncy signal after down coversion inputs the second intermediate-frequency filter again and carries out filtering process, the intermediate-freuqncy signal processed after filtering inputs the adjustment that the second variable gain amplifier carries out gain, through Gain tuning satellite navigation intermediate-freuqncy signal two frequency spectrum as shown in Figure 4;
Analog adder is added through the satellite navigation intermediate-freuqncy signal one of Gain tuning and satellite navigation intermediate-freuqncy signal two, and synthesize a road signal, frequency spectrum as shown in Figure 5.
The satellite navigation intermediate-freuqncy signal of analog to digital converter to synthesis one tunnel carries out analog to digital conversion, and digital signal exports to base band the most at last, in design and use, also should select suitable analog to digital converter sample frequency, avoids signal aliasing occurs.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (1)
1. a satellite navigation Dual-mode two-way road radio frequency chip, comprise the antenna for receiving satellite signal, it is characterized in that, also comprise frequency synthesizer, the first low noise amplifier, the first frequency mixer, the first intermediate-frequency filter, the first variable gain amplifier, the second low noise amplifier, the second frequency mixer, the second intermediate-frequency filter, the second variable gain amplifier, analog adder, analog to digital converter; Satellite navigation signals is inputted by antenna, the output terminal of described antenna is connected with the input end of the first low noise amplifier, the output terminal of the first low noise amplifier is connected with the input end of the first frequency mixer, another input end of first frequency mixer is connected with the output terminal of frequency synthesizer, the output terminal of the first frequency mixer is connected with the input end of the first intermediate-frequency filter, and the output terminal of the first intermediate-frequency filter is connected with the input end of the first variable gain amplifier; Satellite navigation signals two inputs the input end of the second low noise amplifier, the output terminal of the second low noise amplifier is connected with the input end of the second frequency mixer, another input end of second frequency mixer is connected with another output terminal of frequency synthesizer, the output terminal of the second frequency mixer is connected with the input end of the second intermediate-frequency filter, and the output terminal of the second intermediate-frequency filter is connected with the input end of the second variable gain amplifier; The output terminal of the first variable gain amplifier is connected with the input end of analog adder, the output terminal of the second variable gain amplifier is connected with another input end of analog adder, the output terminal of analog adder is connected with the input end of analog to digital converter, the output termination baseband processor of analog to digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310299046.3A CN104297769A (en) | 2013-07-16 | 2013-07-16 | Satellite navigation dual-mode dual-channel radio frequency chip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310299046.3A CN104297769A (en) | 2013-07-16 | 2013-07-16 | Satellite navigation dual-mode dual-channel radio frequency chip |
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| CN104297769A true CN104297769A (en) | 2015-01-21 |
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| CN201310299046.3A Pending CN104297769A (en) | 2013-07-16 | 2013-07-16 | Satellite navigation dual-mode dual-channel radio frequency chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597494A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Beidou navigation terminal dual-mode anti-interference microsystem |
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|---|---|---|---|---|
| US4992743A (en) * | 1989-11-15 | 1991-02-12 | John Fluke Mfg. Co., Inc. | Dual-tone direct digital synthesizer |
| CN1318958A (en) * | 2000-04-14 | 2001-10-24 | 朗迅科技公司 | Multi-branch receiver system and method |
| CN1331516A (en) * | 2000-06-21 | 2002-01-16 | 马科尼通讯股份有限公司 | Device and method for processing frequency signals |
| CN101710831A (en) * | 2009-12-03 | 2010-05-19 | 东南大学 | DAB receiver radio-frequency (RF) front-end with high image rejection ratio |
| CN102096073A (en) * | 2010-12-16 | 2011-06-15 | 重庆西南集成电路设计有限责任公司 | Multi-channel multi-mode satellite navigation radio-frequency integrated circuit |
| CN102305934A (en) * | 2011-05-13 | 2012-01-04 | 陕西长岭电子科技有限责任公司 | Dual-channel radio-frequency signal processing module for navigation receiver |
-
2013
- 2013-07-16 CN CN201310299046.3A patent/CN104297769A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4992743A (en) * | 1989-11-15 | 1991-02-12 | John Fluke Mfg. Co., Inc. | Dual-tone direct digital synthesizer |
| CN1318958A (en) * | 2000-04-14 | 2001-10-24 | 朗迅科技公司 | Multi-branch receiver system and method |
| CN1331516A (en) * | 2000-06-21 | 2002-01-16 | 马科尼通讯股份有限公司 | Device and method for processing frequency signals |
| CN101710831A (en) * | 2009-12-03 | 2010-05-19 | 东南大学 | DAB receiver radio-frequency (RF) front-end with high image rejection ratio |
| CN102096073A (en) * | 2010-12-16 | 2011-06-15 | 重庆西南集成电路设计有限责任公司 | Multi-channel multi-mode satellite navigation radio-frequency integrated circuit |
| CN102305934A (en) * | 2011-05-13 | 2012-01-04 | 陕西长岭电子科技有限责任公司 | Dual-channel radio-frequency signal processing module for navigation receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106597494A (en) * | 2016-12-13 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Beidou navigation terminal dual-mode anti-interference microsystem |
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Application publication date: 20150121 |
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